Report based on a view

Hi,
On my page I have a select list with submit (--> computes an application item AI_OEFID) and I have a "form with report" based on a view.
In my Region Source I have added a where condition: where "EMPID" = :AI_OEFID.
When I select an employee in the select list the report only shows data of the selected "EMPID", which is fine.
The "null display value" of my LOV is "Choose employee..."
When I select "Choose employee..." the report shows "no data", BUT at that moment I want all my employees shown in the report.
So, I tried the following: I changed my where condition: where "EMPID" IN (:AI_OEFID) and I created another (conditional: when value of LOV = -1) Page Processing computation which computes my application item AI_OEFID with the result of a SQL query: select EMPID from <<VIEW>>.
When I select "Choose employee..." the report shows only my first EMPID.
How can I show all my employees in the report when I select the "null value" of my LOV ?
Thanx,
Frederik.

Frederik,
Have a look at this example:
http://htmldb.oracle.com/pls/otn/f?p=31517:99
Denes Kubicek
http://deneskubicek.blogspot.com/
http://htmldb.oracle.com/pls/otn/f?p=31517:1
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